Printable BMI Calculator & Chart
A free printable BMI calculator and chart — enter your weight, height and age in either metric or imperial units to see your Body Mass Index and exactly where you sit on a full colour BMI chart. Weight runs along the x-axis and height up the y-axis, with the healthy, underweight, overweight and obese ranges shaded so you can read your category at a glance. Print it or save it as a PDF.
Body Mass Index (BMI) is a simple screening number that compares your weight to your height. It is worked out as your weight in kilograms divided by the square of your height in metres (kg/m²). This calculator does the maths for you in whichever units you prefer: choose Metric to enter kilograms and centimetres, or Imperial to enter pounds and feet plus inches. Type in your figures and the sheet updates instantly with your BMI value, your weight category and a marker showing your position on the chart.
The chart itself is the useful part. Instead of a single number, it plots the whole landscape: every combination of height and weight, coloured by BMI band. The dividing lines between the bands are the BMI cut-offs (18.5, 25 and 30), so you can see not just where you are but how much weight change would move you between categories at your height. Your point is marked with a cross and labelled with your exact BMI, making it easy to track over time — print a fresh copy each month and compare.
BMI is a general guide, not a diagnosis. It does not distinguish muscle from fat, so very muscular people can read as 'overweight' while some people in the healthy range still carry excess fat. It is also not designed for pregnant women, and for children and teenagers (ages 2–19) BMI must be compared against age- and sex-specific percentile charts rather than the fixed adult cut-offs used here. Treat the result as a starting point for a conversation with a health professional, not the final word.
Printing at exact scale
Every sheet is drawn in real millimetres and prints at exact physical scale. For accurate output, set Scale = 100% (Actual size) and Margins = None in your browser's print dialog. Not sure your printer is honest? Run the printer ruler test first to confirm 50 mm really measures 50 mm. Prefer a file? Use the PDF, PNG or SVG buttons to download the sheet instead of printing — PDF and SVG keep the exact dimensions, and PNG is a 300 DPI image.
Frequently asked questions
How is BMI calculated?
BMI is your weight in kilograms divided by the square of your height in metres (kg/m²). If you enter imperial units, the calculator converts pounds to kilograms and feet/inches to metres first, so the result is identical either way.
What are the BMI categories?
For adults: under 18.5 is underweight, 18.5 to 24.9 is a healthy weight, 25 to 29.9 is overweight, and 30 or above is obese. These are the standard World Health Organization cut-offs and are shown as coloured bands on the chart.
Why does the chart have weight on the x-axis and height on the y-axis?
Plotting weight horizontally and height vertically lets each coloured band show the healthy weight range for every height at a glance. Find your height on the y-axis, read across, and see which weights fall in each category.
Can I switch between metric and imperial?
Yes. The measurement-units selector toggles the whole sheet between metric (kilograms and centimetres) and imperial (pounds and feet/inches). Your existing figures are converted automatically when you switch.
Is BMI accurate for everyone?
No. BMI is a quick screening tool, not a diagnosis. It doesn't account for muscle mass, body composition, bone density, sex or ethnicity, so athletes and very muscular people can be misclassified. Use it as a general guide alongside advice from a health professional.
Does BMI work for children?
Not with these fixed cut-offs. For ages 2–19, BMI is interpreted using age- and sex-specific percentile charts rather than the adult thresholds. The calculator still shows the number, but the adult category bands shouldn't be applied to children and teens.
Why does the sheet ask for my age?
Age is recorded on the sheet and is a reminder that BMI interpretation differs for children, teenagers and older adults. The adult category bands shown apply to ages 20 and over.
Is it really free?
Yes. Every template on printsheet.io is completely free, with no sign-up, no account and no watermark. Generate as many sheets as you like.
How do I get an exact-scale print?
Choose your paper size, then in the print dialog set Scale to 100% or “Actual size” and Margins to None. The sheet is defined in real millimetres, so it prints at true size. Use the calibration ruler page to verify.
Which paper sizes are supported?
A4, A5, A3, A6, US Letter, Legal and Tabloid, in portrait or landscape. Pick the size that matches the paper loaded in your printer.
Can I save it as a PDF instead of printing?
Yes — choose “Save as PDF” as the printer in your browser's print dialog. The PDF keeps the exact millimetre dimensions.
Can I download it as an image (PNG or SVG)?
Yes — as well as Print and PDF, every sheet has a PNG and an SVG download button. PNG gives you a high-resolution (300 DPI) image at the exact page size, ideal for pasting into a document or sharing. SVG is a scalable vector file that stays razor-sharp at any size and can be edited in tools like Inkscape or Illustrator. Both are generated in your browser from the sheet you see on screen.